- Date
- March 29, 1986, 17:15 local (Mar 30, 1986, 01:15 UTC)
- Place
- Walla Walla, WA
- Injuries
- 1 uninjured
- Damage
- Destroyed
- Phase of flight
- Enroute
- Aircraft
- N87595Hiller 12E
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19860329037559A
- Case key
- 40378
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Airframe/component/system failure/malfunction
Propeller system/accessories,planetary gear - failure,totalCause
Maintenance,overhaul - improperCause
Forced landing
Hard landing
Fire
Analysis
A catastrophic failure of the planetary gear of the transmission occurred about 51 flight hours after overhaul. During forced landing a hard landing occurred severing the tail boom. A fire then erupted.
Aircraft
- Registration
- N87595
- Reported as
- Hiller 12E
- Category
- Helicopter
- Serial number
- 1184
- Airframe hours
- 8,315
- Engine
- Lycoming TIVO-540-A2A, 315 horsepower, reciprocating
- Damage
- Destroyed
- Fire
- On-Ground
- Flight
- Aerial application · Part 137
- Registered owner
- Blue Mountain Aviation, Inc.
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · March 28, 1986
- Departed
- Walla Walla, WA
N87595Registration cancelled Feb 20, 2013 · Hiller UH-12DAirframe modelHiller UH-12DEngine modelLycoming VO-435 series
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 41
- Certificate
- Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Front
- Flight hours
- 3,393 total · 541 in this make and model · 3,226 as pilot in command · 61 in the last 90 days · 7 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 30 statute miles
- Lowest ceiling
- None
- Temperature
- 61 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.